CVE-2026-77234

HIGH 8.8

Improper input validation in FreeRTOS-Kernel timer command handling

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

Improper input validation in FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports to execute code in privileged kernel context. To remediate this issue, users should upgrade to version 11.3.1 or later.

CWE	CWE-863
Vendor	freertos
Product	freertos-kernel
Published	Aug 21, 2026
Last Updated	Aug 21, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

FreeRTOS / FreeRTOS-Kernel

7.0.0 ≤ 11.3.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.1 aws.amazon.com: https://aws.amazon.com/security/security-bulletins/2026-086-aws/ github.com: https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-w3vr-pr75-5hc6

Credits

NVIDIA